AeroVironment Inc. (AVAV) slid 12 percent, the most
since February 2010, to $30.82. The maker of low-flying drones
for U.S. military forces said its Global Observer unmanned air
vehicle undergoing flight test envelope expansion experienced a
mishap at Edwards Air Force Base in California today.

Alexander & Baldwin Inc. (ALEX) advanced 19 percent to
$54.47, the biggest gain in the Russell 1000 Index. Bill
Ackman’s Pershing Square Capital LP reported a stake of about
9.9 percent in the parent of ocean-transport company Matson
Navigation and plans to start talks with the company, according
to a regulatory filing.

Horizon Lines Inc. (HRZ) , a shipping company that three
people said may file for bankruptcy as soon as April, rose the
most in the Russell 2000 Index, surging 56 percent to $1.33.

American Apparel Inc. (APP) slipped 6.6 percent to 90
cents, the lowest price since Aug. 31. The Los Angeles-based
clothier at risk of default after four straight quarterly losses
said its cash shortfall may force the chain to seek bankruptcy
protection.

Ascent Solar Technologies Inc. (ASTI) dropped 25
percent, the most intraday since its 2006 initial public
offering, to $2.14. The developer of solar modules used in outer
space said Chief Executive Officer Farhad Moghadam is stepping
down to pursue other interests.

AVI BioPharma Inc. (AVII) fell 17 percent, the most
since August 2009, to $1.55. The biotechnology company focusing
on cardiovascular and infectious diseases said it intends to
sell shares to fund research and development.

DemandTec Inc. (DMAN) tumbled 15 percent, the most since
December 2008, to $11.25. The San Mateo, California-based
provider of consumer demand management software was cut to
“accumulate” from “buy” at Craig Hallum Capital Group LLC.
The 12-month price estimate is $13 a share.

Exfo Inc. (EXF) fell 25 percent, the most since
February 2001, to $8.23. The maker of equipment for the
telecommunications industry said third-quarter revenue will be
no more than $72 million. Analysts project $73.2 million on
average, Bloomberg data show.

F5 Networks Inc. (FFIV) dropped 8.8 percent to $93.56,
the biggest decline in the S&P 500. The maker of software to
handle Internet traffic and content may cut its earnings
forecast for the current quarter by as much as 5 percent because
of slowing business momentum, William & Blair Co. said in a
note.

Inhibitex Inc. (INHX) gained 31 percent, the most since
September 2009, to $4.73. The biopharmaceutical company said its
Phase 1B clinical trial of INX-189, an oral necleotide
polymerase inhibitor to treat chronic hepatitis C, showed
“positive top-line safety and anti-viral data.”

Krispy Kreme Doughnuts Inc. (KKD) declined 21 percent,
the most since September 2007, to $5.56. The doughnut chain
posted fourth-quarter sales that fell short of the average of
analyst estimates, Bloomberg data show. The company also
reiterated its 2012 forecast for operating income.

Logitech International SA (LOGI) fell 19 percent, the
most since July 2003, to $14.71. The world’s biggest maker of
computer mice lowered its full-year sales and profit forecasts.

LogMeIn Inc. (LOGM) climbed 9.3 percent to $46.08, the
highest price since Jan. 12. The provider of services to
remotely connect to computers won a court ruling that it didn’t
infringe a patent owned by 01 Communique Laboratory Inc. (ONE
CN).

Office Depot Inc. (ODP) dropped 9.1 percent to $4.21,
the biggest retreat in the Russell 1000 Index. The second-
largest U.S. office-supply chain forecast first-quarter earnings
before interest and taxes to be down 50 percent compared with
the year-ago period.

Omeros Corp. (OMER) fell 37 percent, the most since its
IPO in 2009, to $5.06. The Seattle biotechnology company said a
product’s Phase 3 trial showed it didn’t meet the endpoints of
the studies in patients undergoing arthroscopic anterior
cruciate ligament reconstruction surgery.

Optimer Pharmaceuticals Inc. (OPTR) gained 11 percent,
the most since May 2009, to $13.13. The drugmaker’s antibiotic
pill works better than a standard treatment for preventing
relapses of potentially fatal intestinal infections often
acquired in hospitals, according to U.S. regulators considering
whether to clear the drug for sale.

Resources Connection Inc. (RECN) declined 23 percent,
the most since September 2007, to $15.01. The provider of legal
and accounting services said third-quarter net income was 2
cents a share, falling short of the average analyst estimate of
6 cents, according to Bloomberg data. Revenue also missed
projections.

Romarco Minerals Inc. (RTRAF) fell 15 percent, the most
since December 2008, to $1.97. The Hill reported that the
Environmental Protection Agency opposed the company’s plan for
the Haile gold mine in South Carolina.

SRA International Inc. (SRX) rallied 9.5 percent to
$31.05, the highest since November 2006. The provider of
computer services to the U.S. government agreed to be bought by
Providence Equity Partners Inc. for $1.88 billion in cash.

Sunrise Senior Living Inc. (SRZ) dropped 9.1 percent,
the most since June 7, to $10.84. The manager of retirement
communities was cut to “hold” from “buy” at Stifel Nicolaus
& Co.

Xyratex Ltd. (XRTX) fell 15 percent, the most since
January 2009, to $9.54. The provider of data storage and network
technology said it will earn 6 cents a share at most in the
second quarter. Analysts projected a profit of 27 cents a share,
Bloomberg data show.